// kadai7-1.c
int *add(int *address1, int *address2, int length)
{
	static int c[2];
	int i;

	for (i = 0; i < length; i++) {
		c[i] = address1[i] + address2[i];
	}
	return c;
}

int main()
{
	int a[2], b[2];
	int *c;

	scanf("%d %d %d %d", &(a[0]), &(a[1]), &(b[0]), &(b[1]));
	c = add(a, b, 2);
	printf("c = %d %d\n", c[0], c[1]);
	return 0;
}